| 摘要 |
<p>F.N. 912,882 Coated abrasive sheet material having a support film backing which comprises a biaxially oriented, heatset coextruded laminate formed from two or more polyester polymers, one layer of the laminate being highly crystalline and the coated layer being tough and non-crystalline. Coatings of binder material and abrasive, which normally adhere poorly to a biaxially oriented heat-set highly crystalline monofilm adhere firmly to the non crystalline surface of the laminate.</p> |
